dupee



l(No Model.) 2 Sheets-Sheet 1 J. C. DUPBE.

TINNERS FURNAGB.

(N0 Model.) 2 sheets-sheen 2.

J. C. DUPBE. `TINNBRS FURNAGB.

No. 579,743.V 'Patented Mar. so, 1897.

UNrrn TATES ATENT vrrrcn.

JOI-IN C. DUPEE, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO R. J. WHITE, OF SAME PLACE.

TINNERS FU RNACE.

SPECIFICATION forming part of Letters Patent No. 579,743, dated March 30, 1897.

Application filed November 14,. 1896. Serial No. 612,084. (No model.)

To @ZZ whom t may concern.-

Beit known that I, JOHN C. DUPEE, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tinners Furnaces, of which the following is a full, clear, and exact description, reference beinghad to the accompanying drawings, forming a part of this specification, in which the corresponding letters of reference in the different igures indicate like parts.

The object of my invention is to so construct a tin ners furnace that hydrocarbon oils, preferably of low gravity, may be advantageously used therein without carbonizing and obstructing the burner or the passages leading thereto.

A further object is to so construct said burner that soldering -irons may be heated therein without overheating the point and thus destroying or impairing the tin surface thereon.

To these ends my invention consists in the combination of elements hereinafter more particularly described, and definitely pointed out in the claims.

In the drawings, Figure l is a vertical sectional vieW of my improved furnace, taken upon the line l l, Fig. 3, viewed in the direction of the arrow there shown. Fig. 2 is a like view taken upon the line 2 2, Fig. 3. Fig. 3 is a horizontal sectional view in plan taken upon the line 3 3, Fig. l. Fig. etis an enlarged sectional view in detail taken upon the line 4: 4:, Fig. 3, showing a portion of the retort; and Fig. 5 is an enlarged rear view in detail of said retort or primary heating-chamber.

Referring to the drawings, a represents the usual oil tank or reservoir connected with furnaces of this class,provided with any wellknown opening for the reception of the oil, and a valve-controlled tube b, Figs. 1 and 2, with which is connected the ordinary exible tube and bulb for forcing air into the reservoir.

A T-union c, Figs. l and 2, is tapped into the top of the reservoir and is provided with the usual needle-controlling valve, the stem d of which is extended, as shown, to the front of the furnace. A short tube e is tapped into the top of the union c and into the bottom of which may enter from the rear.

lclearly shown in Fig. l.

the retort f, which contains the primary heating-chamber hereinafter described.

The retort f consists of a hollow metal casting having the central opening g and the circular chamber h, communicating at the bottom with the tube e and closed at the top by means of a screw-plug t'. The bottom of the retort is provided with an exterior screwthread, by means of which a drip-cup j is attached. An elbow-shaped tube lc, Figs. 2, 3, and 5, is tapped into the upper portion of the retort at its rear and is extended rearwardly and downwardly therefrom. A nipple Z, Fig. 2, having a fine aperture therein, is located in the lowerrend of said elbow concentrically with the opening g, so as to project a jet of vapor forward through said opening. Flan ges um, Figs. 2, 3, and 5, project rearwardly from around the sides and top of the opening g, while notches n are preferably formed therein for the admission of air in addition to that An annular ange o is formed upon the part f, into which is fitted a cylinder p, consisting of two semicylindrical pieces having flanges q, Figs. 2-

and 3, which serve to completely close the forward end of the cylinder as well as to attach the two halves together by means of the screw fr. The interior of the cylinder j) forms both a mixing-chamber and primary combustionchamber and is provided with a series of openings s at the sides, from which the flames may issue. A central stud t projects upwardly from the bottom of the mixing or primary combustion chamber for the purpose of dividing the flame, as and for the purpose hereinafter described.

Extending laterally from the drip-cup j are arms u, which form a bracket or support for a metal plate o, which is bolted thereto, as shown, and is curved upwardly at the sides and is preferably provided with flanges for .the reception of a counterpart plate or shield w, the walls of the two being so curved at the sides as to form an oval in cross-section, as

The part w is provided with a depending hood Figs. 2 and 3, which is extended below the elbow 7c and is adapted to shield the jet from the action of cross-drafts of air. The space between the plates o w forms a secondary combustion or IOO heating chamber for heating soldering-irons, which are placed in said chamber in the manner indicated in dotted `lines in Fig. 3.

The plate 'U is provided with openings near the front, as shown in Fig. 3, and openings y in the rear for the admission of air in such a way as to strike the point of the solderingiron and prevent it from becoming overheated, while the plate 0r hood w is likewise provided with openings at the rear, which, in effect, serves the purpose of a chimney. A shield o beneath the secondary combustion-chamber serves to protect the reservoir from radiation.

Having thus described the various parts of my improved device, I will novT explain its operation and point out its novel and improved features.

Air being forced into the reservoir, the valve-stem tZ is turned sufficiently to permit the oil to flow upwardly through the retort and issue from the nipple Z into the dripcup j. The oil is then lighted in the drip-cup in the usual manner for the purpose of heating the retort, As soon as the latter becomes sufficiently heated to partially vaporize the oil it issues from the nipple Zin the form of a vaporized jet consist-ing partly of gas and partly of oil, which readily ignites the flame or jet passing through the opening c and thus serving to heat the retort or chamber 7L to a temperature sufciently high to partially vaporize the oil without causing it to carbonize and thus obstruct the passage. The jet then passes into the primary combustion or mixing chamber formed within the cylinder p, where it strikes the obstruction t and is divided and directed laterally toward the openings s, and being unable to escape at the forward end the flames are forced laterally and forwardly through said opening, as indicated by the arrows in Fig. 3. The flames being directed against the curved walls of the plates 'u w are directed thereby, as indicated by the arrows in Fig. l, so as to meet at the middle above the cylinder p, against which the two flames are projected downwardly, as indicated, and caused to impinge upon the walls of the mixingchamber, thus heating the latter to sucha high temperature as to fully vaporize the oil. At the same time the air is admitted from the rear through the opening g into the mixing-chamber, where it eonnningles with the vaporous product of the oil at a temperature sufficiently high to enable the oxygen to form a chemical union therewith and produce complete combustion. As the tendency of the flames is to shoot forward from the mixing-chamber at about the angle indicated, they are, when brought together, caused to impinge upon the mixingchamber, but not directly upon the retort, and inasmuch as air is admitted through the openings y, so as to impinge upon the retort, it follows that the latter derives most of its heat from the jet which issues from the nipple Z.

It will be seen from the foregoing that the retort serves only to partially decompose the oil or to initiate its vaporization, but does not become sufficiently hot to cause carbenization, while the mixing-chamber is so formed as to constitute a primary combustion-chamber from which the flames issue to the main or heating chamber and react upon the mixing-chamber, thus completing the vaperization of the oil at Jthe point of combustion instead of in an inclosure or passage devoid of air, and which would, therefore, soon become clogged as a result of carbonization.

Having thus described my invention, I claiml. A tinners furnace in which are combined a source of oil-supply, a retort for heating and partially vaporizing the oil, a combined mixing and primary combustion chamber closed at its forward end and provided with an opening at its rear for the admission of air and openings at its sides for directing the flames into the heating-chamber, and a heatingchamber wholly or partially surrounding said mixingwehamber, the walls of said heatin g-chamber being so shaped as te direct the laterally-issuing flames and cause them to meet and impinge upon the mixing-chamber, substantially as described.

2. The combination in a furnace of the class described, of a source of oi1supply, a nipple in operative communication therewith, a retort interposed between said nipple and source of oil-supply, and between said nip nple and the mixingchamber, a combined mixing and combustion chamber closed at its forward end, open at its rear end and having a series of openings at its sides, means for dividing the flame or jet from the nipple when introduced thereto and directing it forwardly and laterally from the side openings, and an outer heating-chamber extendin g over the top and having its side walls curved so as to cause the laterally-projected flames to meet and impinge upon the mixing-chamber, whereby complete combustion may be pr0- duced without causing the oil to carbonize in the retort, substantially as described.

The combination with a source of oilsupply of the retort f having a central opening and the circular chamber 7L, of the nipple Z, in communication therewith and arranged in the rear thereof concentric with said opening, cylindrical mixingchainber p closed at its forward end and provided with openings s at the sides, and a heating-chamber composed of the plates c Ize, having their side walls curved, substantially as described.

et. The combination in afurnace ofthe class described of a retort for heating the supplied oil to partial vaporization by means of a jet of flame directed through an opening in said retort, of a mixing-chamber arranged in operative proximity to said retort, means for introducing air thereto, means for causing the flame to issue laterally therefrom and an outer heatingchamber for directing the flame IOO IIO

book upon said mixing-Chamber and openspecification, in the presence of tWo subscribings in the rear of said heating-chamber for ingwitnesses, this 7th day of November, 1896.

permittiiw air to be broufvht into Contact with said rtetort and preventilg the same from JOHN C' DUPEE 5 becoming oveiheztted, substantially as de Vitnesses:

scribed. D. H. FLETCHER,

In testimony whereof I have signed this F. H. DRURY. 

